55 lines
1.4 KiB
C++
55 lines
1.4 KiB
C++
// Copyright 2014 The Crashpad Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "util/synchronization/semaphore.h"
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#include <cmath>
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#include <ostream>
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#include "base/check_op.h"
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namespace crashpad {
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Semaphore::Semaphore(int value)
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: semaphore_(dispatch_semaphore_create(value)) {
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CHECK(semaphore_) << "dispatch_semaphore_create";
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}
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Semaphore::~Semaphore() {
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dispatch_release(semaphore_);
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}
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void Semaphore::Wait() {
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CHECK_EQ(dispatch_semaphore_wait(semaphore_, DISPATCH_TIME_FOREVER), 0);
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}
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bool Semaphore::TimedWait(double seconds) {
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DCHECK_GE(seconds, 0.0);
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if (std::isinf(seconds)) {
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Wait();
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return true;
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}
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const dispatch_time_t timeout =
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dispatch_time(DISPATCH_TIME_NOW, seconds * NSEC_PER_SEC);
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return dispatch_semaphore_wait(semaphore_, timeout) == 0;
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}
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void Semaphore::Signal() {
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dispatch_semaphore_signal(semaphore_);
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}
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} // namespace crashpad
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